Thermal Energy

Brian's family has a compost pile at home. They put all the weeds they pull up from the garden in it as well as any vegetable waste they gather from the kitchen. If they keep it moist, all this vegetation will eventually turn into organic soil by the chemical process of decay. Since decay involves a variety of chemical reactions, how might temperature affect the rate at which the compost turns into soil?

A student is pouring baking soda in a beaker of vinegar at room temperature (23 °C). A chemical reaction occurs between the vinegar and baking soda. Which of the following conditions would result in the fastest reaction?

• Pour 10g of baking soda into 250ml of vinegar at 33 °C.

• Pour 10g of baking soda into 250ml of vinegar at 23 °C.

• Pour 20g of baking soda into 500ml of vinegar at 13 °C.

• Pour 20g of baking soda into 500ml of vinegar at 23 °C.

A barefoot student steps on a hot concrete surface. Most of the heat transferred to the student’s skin by this contact is by the process of—

• convection
• conduction
• vaporization
• radiation

A student opens the top window and the bottom window in a hot room. What statement best describes the heat transfer occurring in the room?

• conduction
• radiation
• convection
• evaporation

Tags

NGSS.MS-PS3-4

what is radiation?

• direct touch
• air or liquids
• heat waves/ light waves
• touching the cookies out of the oven

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

Why is there more thermal energy in an iceberg than in a pot of boiling water?    

• a.  The pot insulates the heated molecules
• b.  Most icebergs are fairly warm to the touch
•   c.  Icebergs contain many more molecules than pots of water
•   d.  Water does not hold heat very well

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

The Kinetic Theory of matter says that all particles of matter are constantly in _____________.

• Motion

• state of matter

• convection

• radiation

Tags

NGSS.MS-PS1-4

Particles in motion have ___________ energy.

• wave

• kinetic

• potential

• sound

What type of thermal energy transfer is occurring when you are warmed by the sun?

• Convection

• Conduction

• Radiation

• Solar

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Uneven heating and cooling of the Earth's surface forces the air to circulate in an attempt to find equilibrium or balance. This type of heat transfer is an example of ______.

• Convection

• Conduction

• Radiation

• Solar energy

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6